The average age of chief executive officers (CEO s) in a : GMAT Critical Reasoning (CR)
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# The average age of chief executive officers (CEO s) in a

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The average age of chief executive officers (CEO s) in a [#permalink]

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01 Dec 2009, 08:42
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The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the CEO’s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEO’s remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.
[Reveal] Spoiler: OA

Last edited by Narenn on 30 Oct 2013, 20:25, edited 2 times in total.
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01 Dec 2009, 09:18
is it A ?
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01 Dec 2009, 09:23
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This is a good one. I think it should be C. The information is based on companies that have been operating for at least 20 years, is not an accurate representation of the ages of CEOs in general. There might younger companies with younger CEOs. Perhaps CEO's age just corresponds to the age of the company.
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01 Dec 2009, 09:45
Agree with (C): General trend means that same should be true for younger companies. but no information is given about them.
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01 Dec 2009, 09:47
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Even though the sample size is large, the fact that the study only only incorporates companies that have been around for 20+ years. The conclusion then states that " CEO's of companies in general now tend to be older ", but it does not consider companies that have been around for a shorter period of time.
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01 Dec 2009, 21:04
I also agree with C.

But what is the correct answer.
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02 Dec 2009, 05:32
Guys OA is "C" but can you tell me why not "E"?
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02 Dec 2009, 07:35
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The question states in a large sample the CEO's are on average 8 years older than they were 20 years ago. Because the question already tells you that a large sample is used, knowing the exact number of firms in the survey to determine whether the study is viable or not is not necessary. Also, so what if you know the number of companies that took the survey. That information is useless because you don't know how many firms out of how many considered took the survey. For example, if you know 50 firms took the survey. Is it 50 out of 100 firms or 50 out of 10,000.
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03 Dec 2009, 00:18
Good one.
I picked A initially but then realized it was the generic picture that needed identification
C is correct
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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31 Oct 2013, 02:02
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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02 Dec 2014, 06:20
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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02 Dec 2014, 06:47
brothers wrote:
The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the CEO’s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEO’s remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.

i don't think that c is correct because there is no information about the operating years of a company...
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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02 Dec 2014, 08:29
Farid wrote:
brothers wrote:
The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the CEO’s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEO’s remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.

i don't think that c is correct because there is no information about the operating years of a company...

It's an inference you can make. The passage says the average age of CEOs at a large sample of companies is 57. The average age at THOSE SAME COMPANIES 20 years ago was eight years younger. Therefore, the companies have to still exist in order to be surveyed (atleast 20 years old).
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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23 Mar 2015, 19:03
The argument concludes that: CEO's in general tend to be older now.
The basis for this claim is that:
1. Avg age of CEO in a large samples of companies is 57.
2. Ava age of CEO in these companies 20 years earlier is 57 -8.

A & B: this does not impact on the CEO avg age currently.
C: These companies have been operating for at least 20yrs. Thus, this cannot represent the general companies. CORRECT.
D: No impact.
E: Not necessary for this number.
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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30 Jan 2016, 17:12
brothers wrote:
The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the CEO’s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEO’s remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.

I got stuck between C and E.

A is out - it is irrelevant
B - irrelevant
C = looks good, we make a generalization based on a limited sample. this is a major flaw.
D - approximate information given - well, tempting, but not. C is more strong.
E - the number of companies in the sample is irrelevant.

C for me
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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30 Jan 2016, 23:08
i m confused this is weaken question why are some posts based on inference , to weaken a conclusion we have to add new information and making the assumption false, C cannot be the assumption , In C we are given with the fact that is already stated in question.

Expert please correct me if i am missing anything.
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Re: The average age of chief executive officers (CEO s) in a [#permalink]

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02 Feb 2016, 23:15
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i m confused this is weaken question why are some posts based on inference , to weaken a conclusion we have to add new information and making the assumption false, C cannot be the assumption , In C we are given with the fact that is already stated in question.

Expert please correct me if i am missing anything.
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This is a weaken question. We have to find the conclusion and weaken it.

Premises:

The average age of CEOs in a large sample of companies is 57.
The average age of CEO’s in those same companies 20 years ago was approximately eight years younger.

Conclusion: CEO’s in general tend to be older now.

Notice what the conclusion says: CEOs IN GENERAL tend to be older now. How can you deduce something about CEOs in general now when you have researched CEOs of only those companies which were in operation 20 yrs ago too. What about all the companies that came up in the last 20 years? What if the CEOs of the younger companies are much younger. Then the conclusion weakens. Option (C) points out this flaw in the reasoning. Hence it weakens the conclusion.
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Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Senior Manager Status: Always try to face your worst fear because nothing GOOD comes easy. You must be UNCOMFORTABLE to get to your COMFORT ZONE Joined: 15 Aug 2014 Posts: 384 Concentration: Marketing, Technology GMAT 1: 570 Q44 V25 GMAT 2: 600 Q48 V25 WE: Information Technology (Consulting) Followers: 7 Kudos [?]: 44 [0], given: 472 Re: The average age of chief executive officers (CEO s) in a [#permalink] ### Show Tags 17 Jun 2016, 02:36 VeritasPrepKarishma wrote: sudhirmadaan wrote: i m confused this is weaken question why are some posts based on inference , to weaken a conclusion we have to add new information and making the assumption false, C cannot be the assumption , In C we are given with the fact that is already stated in question. Expert please correct me if i am missing anything. VeritasPrepKarishma This is a weaken question. We have to find the conclusion and weaken it. Premises: The average age of CEOs in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. Conclusion: CEO’s in general tend to be older now. Notice what the conclusion says: CEOs IN GENERAL tend to be older now. How can you deduce something about CEOs in general now when you have researched CEOs of only those companies which were in operation 20 yrs ago too. What about all the companies that came up in the last 20 years? What if the CEOs of the younger companies are much younger. Then the conclusion weakens. Option (C) points out this flaw in the reasoning. Hence it weakens the conclusion. Hi VeritasPrepKarishma, Can you please explain why option 'B' is incorrect _________________ "When you want to succeed as bad as you want to breathe, then you’ll be successful.” - Eric Thomas I need to work on timing badly!! Intern Joined: 23 Sep 2015 Posts: 24 Followers: 2 Kudos [?]: 17 [0], given: 10 Re: The average age of chief executive officers (CEO s) in a [#permalink] ### Show Tags 25 Jun 2016, 10:42 idea - if sample size 20 yrs ago and now is not comparable then this argument will be weaken (A) The dates when the CEO’s assumed their current positions have not been specified. - dates are not going to affect it. (B) No information is given concerning the average number of years that CEO’s remain in office. - avg num of yrs are not concerned for age (C) The information is based only on companies that have been operating for at least 20 years. - this is giving right idea for both samples, as it is concluding that thr is no data for companies older then 20 yrs. (D) Only approximate information is given concerning the average age of the CEO’s 20 years ago. - no sufficient info given for avg age for 20 yrs ago (E) Information concerning the exact number of companies in the sample has not been given. _________________ Thanks! Do give some kudos. Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 7132 Location: Pune, India Followers: 2140 Kudos [?]: 13713 [0], given: 222 Re: The average age of chief executive officers (CEO s) in a [#permalink] ### Show Tags 26 Jun 2016, 20:44 smartguy595 wrote: VeritasPrepKarishma wrote: sudhirmadaan wrote: i m confused this is weaken question why are some posts based on inference , to weaken a conclusion we have to add new information and making the assumption false, C cannot be the assumption , In C we are given with the fact that is already stated in question. Expert please correct me if i am missing anything. VeritasPrepKarishma This is a weaken question. We have to find the conclusion and weaken it. Premises: The average age of CEOs in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. Conclusion: CEO’s in general tend to be older now. Notice what the conclusion says: CEOs IN GENERAL tend to be older now. How can you deduce something about CEOs in general now when you have researched CEOs of only those companies which were in operation 20 yrs ago too. What about all the companies that came up in the last 20 years? What if the CEOs of the younger companies are much younger. Then the conclusion weakens. Option (C) points out this flaw in the reasoning. Hence it weakens the conclusion. Hi VeritasPrepKarishma, Can you please explain why option 'B' is incorrect Premises: The average age of CEOs in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. Conclusion: CEO’s in general tend to be older now. (B) No information is given concerning the average number of years that CEO’s remain in office. This is irrelevant. Does it matter whether the CEO's remain in office for 10 years or for 2 years? Point is, it doesn't matter whether the 20 companies have the same CEOs that they had 8 yrs ago or they change CEO's every year and have been hiring older CEOs. In any case, in those 20 companies CEOs are older today than they were 8 yrs ago. So option (B) does not weaken the conclusion. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

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Re: The average age of chief executive officers (CEO s) in a   [#permalink] 26 Jun 2016, 20:44

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